UniProt:P25963 NFKBIA

chain
  • chain:1-317
checksum 088B313226786395
comment
  • FUNCTION Inhibits the activity of dimeric NF-kappa-B/REL complexes by trapping REL (RELA/p65 and NFKB1/p50) dimers in the cytoplasm by masking their nuclear localization signals (PubMed:1493333, PubMed:7479976, PubMed:36651806). On cellular stimulation by immune and pro-inflammatory responses, becomes phosphorylated promoting ubiquitination and degradation, enabling the dimeric RELA to translocate to the nucleus and activate transcription (PubMed:7796813, PubMed:7628694, PubMed:7878466, PubMed:7479976).SUBUNIT Interacts with RELA; the interaction requires the nuclear import signal (PubMed:1493333). Part of a 70-90 kDa complex at least consisting of CHUK, IKBKB, NFKBIA, RELA, ELP1 and MAP3K14 (PubMed:9751059). Interacts with NKIRAS1 and NKIRAS2 (PubMed:10657303). Interacts with isoform 1 and isoform 2 of RWDD3; the interaction enhances sumoylation (PubMed:17956732, PubMed:23469069). Interacts with PRMT2 (PubMed:16648481). Interacts with PRKACA in platelets; this interaction is disrupted by thrombin and collagen (PubMed:20356841). Interacts with MEFV (PubMed:18577712). Interacts with DDRGK1; positively regulates NFKBIA phosphorylation and degradation (PubMed:23675531).SUBUNIT (Microbial infection) Interacts with HBV protein X.INTERACTION Shuttles between the nucleus and the cytoplasm by a nuclear localization signal (NLS) and a CRM1-dependent nuclear export.INDUCTION Induced in adherent monocytes.PTM Phosphorylated at Ser-32 and Ser-36 by IKKA/CHUK and IKKB/IKBKB; disables inhibition of NF-kappa-B DNA-binding activity (PubMed:7796813, PubMed:7628694, PubMed:7878466, PubMed:8631829, PubMed:9701247, PubMed:10329681, PubMed:10882136). Phosphorylation at positions 32 and 36 is prerequisite to recognition by the SCF(FBXW11) and SCF(BTRC) complexes, leading to polyubiquitination and subsequent degradation (PubMed:7628694, PubMed:8631829, PubMed:9701247, PubMed:10329681). Phosphorylated at Ser-32 in response to FK506 treatment: phosphorylation is independent of IKKA/CHUK and IKKB/IKBKB and promotes NFKBIA degradation, followed by NF-kappa-B activation (PubMed:10574930). Phosphorylated at Tyr-42: its effect is however unclear (PubMed:8797825, PubMed:8940099). According to a report, phosphorylation at Tyr-42 activates NF-kappa-B without triggering proteolytic degradation of NFKBIA (PubMed:8797825). According to another publication, phosphorylation at Tyr-42 inhibits NF-kappa-B activity by preventing phosphorylation at Ser-32 and Ser-36 and subsequent ubiquitination and degradation (PubMed:8940099).PTM Polyubiquitinated at Lys-21 and/or Lys-22 following phosphorylation at Ser-32 and Ser-36 (PubMed:7479976, PubMed:8631829, PubMed:9701247, PubMed:10329681, PubMed:20347421). Monoubiquitinated at Lys-21 and/or Lys-22 by UBE2D3 (PubMed:7479976, PubMed:10329681, PubMed:20347421). Ubiquitin chain elongation is then performed by CDC34 in cooperation with the SCF(FBXW11) E3 ligase complex, building ubiquitin chains from the UBE2D3-primed NFKBIA-linked ubiquitin (PubMed:10437795, PubMed:20347421). The resulting polyubiquitination leads to protein degradation (PubMed:7628694, PubMed:7479976, PubMed:20347421). Also ubiquitinated by the SCF(BTRC) complex following stimulus-dependent phosphorylation at Ser-32 and Ser-36 (PubMed:10644755). Deubiquitinated by USP38, leading to NF-kappa-B inhibition (PubMed:36651806).PTM Sumoylated; sumoylation requires the presence of the nuclear import signal. Sumoylation blocks ubiquitination and proteasome-mediated degradation of the protein thereby increasing the protein stability.PTM Hydroxylated by HIF1AN.PTM (Microbial infection) Deubiquitinated by porcine reproductive and respiratory syndrome virus Nsp2 protein, which thereby interferes with NFKBIA degradation and impairs subsequent NF-kappa-B activation.DISEASE The disease is caused by variants affecting the gene represented in this entry.SIMILARITY Belongs to the NF-kappa-B inhibitor family.ONLINE INFORMATION NFKBIA mutation db
crossReference
databaseName UniProt
dbId 57208
description
  • recommendedName: NF-kappa-B inhibitor alpha alternativeName: I-kappa-B-alpha shortName: IkB-alpha shortName: IkappaBalpha alternativeName: Major histocompatibility complex enhancer-binding protein MAD3
displayName UniProt:P25963 NFKBIA
geneName
  • NFKBIA
  • IKBA
  • MAD3
  • NFKBI
identifier P25963
isSequenceChanged false
keyword
  • 3D-structure
  • ANK repeat
  • Cytoplasm
  • Disease variant
  • Ectodermal dysplasia
  • Host-virus interaction
  • Hydroxylation
  • Isopeptide bond
  • Nucleus
  • Phosphoprotein
  • Reference proteome
  • Repeat
  • Ubl conjugation
modified [InstanceEdit:12187927] Wright, Adam, 2024-03-12
name
  • NFKBIA
otherIdentifier
  • 11744000_a_at
  • 11745878_x_at
  • 11757894_x_at
  • 1461_at
  • 16791991
  • 201502_PM_s_at
  • 201502_s_at
  • 3561040
  • 3561041
  • 3561043
  • 3561044
  • 3561046
  • 3561048
  • 3561050
  • 3561053
  • 3561054
  • 4792
  • 7978644
  • A_23_P106002
  • GE82547
  • GO:0002376
  • GO:0005515
  • GO:0005634
  • GO:0005654
  • GO:0005737
  • GO:0005829
  • GO:0005886
  • GO:0006351
  • GO:0006355
  • GO:0006606
  • GO:0006886
  • GO:0006913
  • GO:0006915
  • GO:0006954
  • GO:0007219
  • GO:0007249
  • GO:0007253
  • GO:0008139
  • GO:0010468
  • GO:0010745
  • GO:0010875
  • GO:0010888
  • GO:0012501
  • GO:0019899
  • GO:0023052
  • GO:0030154
  • GO:0031625
  • GO:0031663
  • GO:0032088
  • GO:0032495
  • GO:0032496
  • GO:0033209
  • GO:0033256
  • GO:0034142
  • GO:0035994
  • GO:0038061
  • GO:0042127
  • GO:0042802
  • GO:0043124
  • GO:0043226
  • GO:0043330
  • GO:0045638
  • GO:0045746
  • GO:0045893
  • GO:0045944
  • GO:0048856
  • GO:0050729
  • GO:0050853
  • GO:0051059
  • GO:0051247
  • GO:0060261
  • GO:0070417
  • GO:0070427
  • GO:0070431
  • GO:0070498
  • GO:0071356
  • GO:0098542
  • GO:0140311
  • GO:0140313
  • HMNXSV003036480
  • Hs.81328.0.S1_3p_a_at
  • M69043_at
  • PH_hs_0004662
  • TC14001036.hg
physicalEntity
referenceDatabase [ReferenceDatabase:2] UniProt
referenceGene
referenceTranscript
schemaClass ReferenceGeneProduct
secondaryIdentifier
  • IKBA_HUMAN
  • B2R8L6
sequenceLength 317
species [Species:48887] Homo sapiens
url https://purl.uniprot.org/uniprot/P25963

Referrals

(referenceEntity)
(referenceSequence)
(interactor)
Cite Us!